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OCR Chemistry F322~ 4th June 2013~ AS Chemistry

What's the average for an A in chem? 75 odd?

I would say around that on average.
This year?
I reckon it will stay put t around 77-79 again...
Much harsher than Biology and totally vile compared to Physics for those that studied it...
:smile:

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Reply 3681

lebron_23

2

Original post by CurtisDean

Guys how embarrassing! I spelt 'breathalyser' as 'breatherlyser' loool :-S

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Not as bad as me, I spelt it as 'breathylyser' :colondollar:

Reply 3682

walkers38

17

Original post by Konshi

What was the 2 mark Hess cycle answer?

‒4596 or ‒4956 something like that.

Reply 3683

Room4student

For 3 d ii
I said I is the cis isomer and J is the trans, will i get a mark?

For 4 b i
I wrote 'Heat' it was a guess, is that right?

Reply 3684

ThatScienceGuy

AHHHHHHHH I FORGOT ABOUT THE BREATHALYSER :mad:

How many marks was that question ????

Reply 3685

freetown

6

Original post by the A* guy

HERE AS PROMISED, The F322 June 2013 paper:

http://examwizard.yolasite.com/resources/FULL%20F322%20June%202013%20PAPER%20Part%201%20.pdf

http://examwizard.yolasite.com/resources/FULL%20F322%20June%202013%20PAPER%20Part%202.pdf

Hope IT HELPS. :biggrin:

F322 QP (2013)

Here I merged the photocopy and put it on a faster website to make life easier.
Thanks for the paper.

EDIT:
These are new links for people that are having trouble:

1.) Google Docs:
https://docs.google.com/file/d/0Bwx_Pin49IF6SDVOUVJ1SEdHRzg/edit?pli=1

2.) Dropbox:
https://www.dropbox.com/s/ttht4j0glu2bytj/JUNE%202013_F322.pdf

(edited 10 years ago)

Reply 3686

Ché.

Original post by jacksonmeg

for the one about formation of ozone, what were the two equations?
I did O3 + O -> 2O2 and
O2 + O -> O3
is that right ?

I am going to have to say that those equations - that could be expressed as one - was suppose to be included with the question ABOVE that one..

That is showing the overall equation for this reaction breakdown.
The ones below are showing the radical substitution!

THESE ARE THEM:
NO. + O3 goes to NO2. + O2
Then...
NO2. + O goes to NO. + O2.

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Reply 3687

walkers38

17

Original post by jacksonmeg

for the one about formation of ozone, what were the two equations?
I did O3 + O -> 2O2 and
O2 + O -> O3
is that right ?

I put the second one with reversible arrow. Isn't the first eqn breaking down of ozone. They asked how is it maintained? I gave the second eqn and said the reaction continues and while at this, absorbs UV and releases as heat with no net loss of ozone.

Reply 3688

such

5

Original post by Room4student

For 3 d ii
I said I is the cis isomer and J is the trans, will i get a mark?

You're right, and I think you will get the mark.

For 4 b i
I wrote 'Heat' it was a guess, is that right?

I don't think that would be acceptable. UV light is essential to start a radical reaction.

Reply 3689

the A* guy

2

I Hope the paper I uploaded Helps everyone in discovering an ESTIMATE of their mark, sorry for the delay.

~ The A* Guy ~

Reply 3690

jacksonmeg

11

Original post by Ché.

I am going to have to say that those equations - that could be expressed as one - was suppose to be included with the question ABOVE that one..

That is showing the overall equation for this reaction breakdown.
The ones below are showing the radical substitution!

THESE ARE THEM:
NO. + O3 goes to NO2. + O2
Then...
NO2. + O goes to NO. + O2.

Posted from TSR Mobile

thats what i did for the question above, but whats the answer for the ozone maintenance one ?

Reply 3691

GeneralOJB

Original post by Room4student

For 3 d ii
I said I is the cis isomer and J is the trans, will i get a mark?

For 4 b i
I wrote 'Heat' it was a guess, is that right?

It's e/z not cis/trans bro.

I put uv light, but heat will almost certainly be allowed.

Reply 3692

nothepreacher

18

What is the UMS you need for an A* overall?

Reply 3693

walkers38

17

Original post by freetown

F322 QP (2013)

Here I merged the photocopy and put it on a faster website to make life easier.
Thanks for the paper.

Please teach me how to merge different pdf files in one? I have been wanting to know this all my life?????

Reply 3694

jacksonmeg

11

Original post by walkers38

I put the second one with reversible arrow. Isn't the first eqn breaking down of ozone. They asked how is it maintained? I gave the second eqn and said the reaction continues and while at this, absorbs UV and releases as heat with no net loss of ozone.

if you just show the making of ozone that isnt maintaining, its increasing, right ?

Reply 3695

Fullycorporate

Original post by Room4student

For 3 d ii
I said I is the cis isomer and J is the trans, will i get a mark?

Yeah I put I is a Z-isomer and J is a an E-isomer

Reply 3696

irfymahmood

for the ozone depletion i used the equation and i explained it, would i get 2 marks for that?

Reply 3697

Saif95

12

Original post by the A* guy

I Hope the paper I uploaded Helps everyone in discovering an ESTIMATE of their mark, sorry for the delay.

~ The A* Guy ~

Thanks!

Sorry for thinking you were lying

Reply 3698

Onkar-M

Guys if I did the propagation steps differently-
Like reacted Ch4 with Br• and showed that
Then Ch4 with I• and still got the required products- will that be ok?

Reply 3699

Lysipud

1

Did anyone else get -4534 for the formation?

OCR Chemistry F322~ 4th June 2013~ AS Chemistry

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